I'm still trying to find out why NAT stops working after awhile, so I'm again going to see if anyone has a way to debug this. I'm not asking for people to debug it for me, I'll do the leg-work, but how do you debug at the kernel-level what netfilter is doing with packets? The firewall/load balancing works for awhile then suddenly stops working, could be 5 minutes, could be 5 hours...I am at a loss as to what causes it and nothing in dmesg/syslog for errors. Just flushing the rules and routing tables and re-configing fixes the problem so I'm guessing there is some limit it is hitting, but with nothing being logged I don't know where to start. I'm not sure if some of the kernel debugging tools can be limited to only view netfilter activity, but I think that's what I'll need to figure this out. Thanks, Dan